The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 1986
Filed:
Nov. 15, 1984
Applicant:
Inventor:
Masato Takami, Kyoto, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428607 ; 428612 ; 428626 ; 428675 ; 174 685 ;
Abstract
A copper foil resistant to acids and heat and yet easy to etch is obtained by forming a cobalt layer containing molybdenum and/or tungsten on the bonding surface thereof. Roughening of the foil surface prior to formation of the layer provides highly peel-resistant bonding of the foil thereat to resin-containing substrates of the type found in typical printed circuit boards. The provision of a chromate layer on the cobalt further improves the adhesion between the copper foil and resin-containing substrates.